Year SPI (scale 0-100) 2005 27.39375 2006 27.9 2007 34.7375 2008 35.14375 2009 35.14375 2010 34.4625 2011 36.025 2012 31.7625 2013 33.71875 2014 33.4 2015 32.725 2016 34.74375 2017 35.91875 2018 32.56875 2019 34.91875 2020 46.39375 2021 55.41875 2022 55.41875